This exciting zoom lens provides ultra wide-angle coverage to the EOS 20D, 30D, 40D, 50D and Digital Rebel SLRs. Equivalent to a 16-35mm zoom, it offers excellent performance and optics designed from the ground-up for digital SLR use. Three Aspherical lens elements, plus a Super-UD element, assure image quality. Its ring-type USM means fast and silent AF along with full-time manual focus. It focuses as close as 9.5 inches.
Focal Length 1 3.5-4.5 Lens Construction 13 elements in 10 groups Diagonal Angle of View 107 30 - 63 30 Focus Adjustment Inner focusing system, with focusing cam Closest Focusing Distance 0.24m / 0.79 ft. Zoom System Ring USM Filter Size 77mm Max. Diameter x Length 83.5 x 89.8mm Weight 385g